Results 121 to 130 of about 5,533 (174)

ChemInform Abstract: Microwave‐Assisted Synthesis of 2‐Pyridone and 2‐Pyridone‐Based Compounds

ChemInform, 2015
AbstractReview: 85 refs.
Dusan Z. Mijin, Jelena M. Markovic, Danijela V. Brkovic, Aleksandar D. Marinkovic   +3 more
openaire   +1 more source

Photoreactions of alkylated 2-pyridones

Journal of the Chemical Society, Perkin Transactions 2, 1985
Photoisomerisation and dimerisation reactions in solution have been studied with a series of alkylated 2- pyridones (1). The low quantum efficiencies for the photoisomerisation (0.01–0.07) are related to the short-lived singlet excited states (below 1 ns). The effects of temperature, solvent, and substrate concentration were also examined.
Ryoka Matsushima, Kazuhide Terada
openaire   +1 more source

Developments in the Chemistry of 2-Pyridone

Synthetic Communications, 2014
Abstract The focus of our review is on the methods of synthesis and chemical reactivity of 2-pyridone and some derivatives as 2-chloro-3-nicotinonitrile in addition to the biological activity of the 2-pyridone moiety.
Wafaa Salama Hamama, Mohamed Waly, Ibrahim El-Hawary, Hanafi Hassan Zoorob   +3 more
openaire   +1 more source

Orientation in the nitration of 2-pyridones

Chemistry of Heterocyclic Compounds, 1978
The ratio of 3- and 5-nitro isomers formed in the nitration of 2-pyridones with nitric acid is determined by the reaction temperature but is independent of the concentration of the nitrating agent. The presence of a phenyl group in the 6 position of the α-pyridone ring hinders incorporation of a nitro group in the 5 position.
N. P. Shusherina, T. I. Likhomanova, E. V. Adamskaya   +2 more
openaire   +1 more source

Multicomponent Synthesis of Highly Substituted 2‐Pyridones.

ChemInform, 2007
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
Carlos Marcos, Ana Neo, Rosa Carrillo, Susana Barriga, Edelmiro Momán, Stefano Marcaccini   +5 more
openaire   +1 more source

Tautomerism and Microsolvation in 2-Hydroxypyridine/2-Pyridone

The Journal of Physical Chemistry A, 2010
The Fourier transform microwave spectra of the hydrated forms of the tautomeric pair 2-pyridinone/2-hydroxypyridine (2PO/2HP) have been investigated in a supersonic expansion. Three hydrated species, 2PO-H₂O, 2HP-H₂O, and 2PO-(H₂O)₂, have been observed in the rotational spectrum.
S. Mata, V. Cortijo, CAMINATI, WALTHER, J. L. Alonso, M. E. Sanz, J. C. López, S. Blanco   +6 more
openaire   +3 more sources

Photochemical dehydrogenation of 3,4-dihydro-2-pyridones

Photochemical & Photobiological Sciences, 2009
Photochemical dehydrogenation of various substituted 3,4-dihydro-2-pyridones was achieved in a very efficient way by employing 10-15 mol% of photo-induced electron transfer sensitizers like 9-cyanoanthracene, 9-cyanophenanthrene and 1-cyanonaphthalene in presence of molecular oxygen, for the first time.
Partha Sarathi, Sadhu, Mettu, Ravinder, Perepogu Arun, Kumar, Vaidya Jayathirtha, Rao   +3 more
openaire   +2 more sources

Enantioselective Photochemical Reactions of 2-Pyridones in Solution

Organic Letters, 2001
[reaction: see text] Two key photochemical reactions of prochiral 2-pyridones were studied in the presence of a chiral host. The [4 + 4]-photocycloaddition with cyclopentadiene (CpH) proceeded smoothly and with high enantioselectivity (84-87% ee). The absolute configuration of the endo-diastereoisomer was established by X-ray crystallography.
T, Bach, H, Bergmann, K, Harms
openaire   +2 more sources

New Synthetic Methods for 2‐Pyridone Rings

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Mercedes Torres, Salvador Gil, Margarita Parra   +2 more
openaire   +1 more source

Hybrid density functionals and ab initio studies of 2-pyridone–H2O and 2-pyridone–(H2O)2

Chemical Physics Letters, 2000
Abstract Theoretical calculations have been carried out on the interaction between water and the carbonyl base 2-pyridone. The calculations have been performed with two hybrid density functionals (B3-PW91 and B3-LYP). The comparison with experimental gas phase data as well as with results from the ab initio methods RHF and MP2 shows good performance ...
Ahmed Dkhissi, Ludwik Adamowicz, Guido Maes   +2 more
openaire   +1 more source